2 Copyright (C) 2000-2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <boost/scoped_array.hpp>
29 #include <glibmm/thread.h>
31 #include "pbd/basename.h"
32 #include "pbd/xml++.h"
33 #include "pbd/stacktrace.h"
34 #include "pbd/enumwriter.h"
35 #include "pbd/convert.h"
37 #include "evoral/Curve.hpp"
39 #include "ardour/audioregion.h"
40 #include "ardour/session.h"
41 #include "ardour/dB.h"
42 #include "ardour/playlist.h"
43 #include "ardour/audiofilesource.h"
44 #include "ardour/region_factory.h"
45 #include "ardour/runtime_functions.h"
46 #include "ardour/transient_detector.h"
47 #include "ardour/progress.h"
53 using namespace ARDOUR;
57 namespace Properties {
58 PBD::PropertyDescriptor<bool> envelope_active;
59 PBD::PropertyDescriptor<bool> default_fade_in;
60 PBD::PropertyDescriptor<bool> default_fade_out;
61 PBD::PropertyDescriptor<bool> fade_in_active;
62 PBD::PropertyDescriptor<bool> fade_out_active;
63 PBD::PropertyDescriptor<float> scale_amplitude;
64 PBD::PropertyDescriptor<bool> fade_out_is_xfade;
65 PBD::PropertyDescriptor<bool> fade_out_is_short;
66 PBD::PropertyDescriptor<bool> fade_in_is_xfade;
67 PBD::PropertyDescriptor<bool> fade_in_is_short;
71 static const double VERY_SMALL_SIGNAL = 0.0000001; //-140dB
73 /* Curve manipulations */
76 reverse_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
78 size_t len = src->back()->when;
80 for (Evoral::ControlList::const_iterator it = src->begin(); it!=src->end(); it++) {
81 dst->add (len - (*it)->when, (*it)->value);
86 generate_inverse_power_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
88 // calc inverse curve using sum of squares
89 for (Evoral::ControlList::const_iterator it = src->begin(); it!=src->end(); ++it ) {
90 float value = (*it)->value;
91 value = 1 - powf(value,2);
93 dst->fast_simple_add ( (*it)->when, value );
98 generate_db_fade (boost::shared_ptr<Evoral::ControlList> dst, double len, int num_steps, float dB_drop)
101 dst->fast_simple_add (0, 1);
103 //generate a fade-out curve by successively applying a gain drop
104 float fade_speed = dB_to_coefficient(dB_drop / (float) num_steps);
105 for (int i = 1; i < (num_steps-1); i++) {
107 for (int j = 0; j < i; j++) {
110 dst->fast_simple_add (len*(double)i/(double)num_steps, coeff);
113 dst->fast_simple_add (len, VERY_SMALL_SIGNAL);
117 merge_curves (boost::shared_ptr<Evoral::ControlList> dst,
118 boost::shared_ptr<const Evoral::ControlList> curve1,
119 boost::shared_ptr<const Evoral::ControlList> curve2)
121 Evoral::ControlList::EventList::size_type size = curve1->size();
123 //curve lengths must match for now
124 if (size != curve2->size()) {
128 Evoral::ControlList::const_iterator c1 = curve1->begin();
130 for (Evoral::ControlList::const_iterator c2 = curve2->begin(); c2!=curve2->end(); c2++ ) {
131 float v1 = accurate_coefficient_to_dB((*c1)->value);
132 float v2 = accurate_coefficient_to_dB((*c2)->value);
134 double interp = v1 * ( 1.0-( (double)count / (double)size) );
135 interp += v2 * ( (double)count / (double)size );
137 interp = dB_to_coefficient(interp);
138 dst->add ( (*c1)->when, interp );
145 AudioRegion::make_property_quarks ()
147 Properties::envelope_active.property_id = g_quark_from_static_string (X_("envelope-active"));
148 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for envelope-active = %1\n", Properties::envelope_active.property_id));
149 Properties::default_fade_in.property_id = g_quark_from_static_string (X_("default-fade-in"));
150 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-in = %1\n", Properties::default_fade_in.property_id));
151 Properties::default_fade_out.property_id = g_quark_from_static_string (X_("default-fade-out"));
152 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-out = %1\n", Properties::default_fade_out.property_id));
153 Properties::fade_in_active.property_id = g_quark_from_static_string (X_("fade-in-active"));
154 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-active = %1\n", Properties::fade_in_active.property_id));
155 Properties::fade_out_active.property_id = g_quark_from_static_string (X_("fade-out-active"));
156 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-active = %1\n", Properties::fade_out_active.property_id));
157 Properties::scale_amplitude.property_id = g_quark_from_static_string (X_("scale-amplitude"));
158 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for scale-amplitude = %1\n", Properties::scale_amplitude.property_id));
159 Properties::fade_out_is_xfade.property_id = g_quark_from_static_string (X_("fade-out-is-xfade"));
160 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-is-xfade = %1\n", Properties::fade_out_is_xfade.property_id));
161 Properties::fade_out_is_short.property_id = g_quark_from_static_string (X_("fade-out-is-short"));
162 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-is-short = %1\n", Properties::fade_out_is_short.property_id));
163 Properties::fade_in_is_xfade.property_id = g_quark_from_static_string (X_("fade-in-is-xfade"));
164 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-is-xfade = %1\n", Properties::fade_in_is_xfade.property_id));
165 Properties::fade_in_is_short.property_id = g_quark_from_static_string (X_("fade-in-is-short"));
166 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-is-short = %1\n", Properties::fade_in_is_short.property_id));
170 AudioRegion::register_properties ()
172 /* no need to register parent class properties */
174 add_property (_envelope_active);
175 add_property (_default_fade_in);
176 add_property (_default_fade_out);
177 add_property (_fade_in_active);
178 add_property (_fade_out_active);
179 add_property (_scale_amplitude);
180 add_property (_fade_out_is_xfade);
181 add_property (_fade_out_is_short);
182 add_property (_fade_in_is_xfade);
183 add_property (_fade_in_is_short);
186 #define AUDIOREGION_STATE_DEFAULT \
187 _envelope_active (Properties::envelope_active, false) \
188 , _default_fade_in (Properties::default_fade_in, true) \
189 , _default_fade_out (Properties::default_fade_out, true) \
190 , _fade_in_active (Properties::fade_in_active, true) \
191 , _fade_out_active (Properties::fade_out_active, true) \
192 , _scale_amplitude (Properties::scale_amplitude, 1.0) \
193 , _fade_in_is_xfade (Properties::fade_in_is_xfade, false) \
194 , _fade_out_is_xfade (Properties::fade_out_is_xfade, false) \
195 , _fade_in_is_short (Properties::fade_in_is_short, false) \
196 , _fade_out_is_short (Properties::fade_out_is_short, false)
198 #define AUDIOREGION_COPY_STATE(other) \
199 _envelope_active (Properties::envelope_active, other->_envelope_active) \
200 , _default_fade_in (Properties::default_fade_in, other->_default_fade_in) \
201 , _default_fade_out (Properties::default_fade_out, other->_default_fade_out) \
202 , _fade_in_active (Properties::fade_in_active, other->_fade_in_active) \
203 , _fade_out_active (Properties::fade_out_active, other->_fade_out_active) \
204 , _scale_amplitude (Properties::scale_amplitude, other->_scale_amplitude) \
205 , _fade_in_is_xfade (Properties::fade_in_is_xfade, other->_fade_in_is_xfade) \
206 , _fade_out_is_xfade (Properties::fade_out_is_xfade, other->_fade_out_is_xfade) \
207 , _fade_in_is_short (Properties::fade_in_is_short, other->_fade_in_is_short) \
208 , _fade_out_is_short (Properties::fade_out_is_short, other->_fade_out_is_short)
209 /* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
214 register_properties ();
216 suspend_property_changes();
217 set_default_fades ();
218 set_default_envelope ();
219 resume_property_changes();
221 listen_to_my_curves ();
222 connect_to_analysis_changed ();
223 connect_to_header_position_offset_changed ();
226 /** Constructor for use by derived types only */
227 AudioRegion::AudioRegion (Session& s, framepos_t start, framecnt_t len, std::string name)
228 : Region (s, start, len, name, DataType::AUDIO)
229 , AUDIOREGION_STATE_DEFAULT
231 , _fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
232 , _inverse_fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
233 , _fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
234 , _inverse_fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
235 , _envelope (new AutomationList(Evoral::Parameter(EnvelopeAutomation)))
236 , _fade_in_suspended (0)
237 , _fade_out_suspended (0)
240 assert (_sources.size() == _master_sources.size());
243 /** Basic AudioRegion constructor */
244 AudioRegion::AudioRegion (const SourceList& srcs)
246 , AUDIOREGION_STATE_DEFAULT
247 , _automatable(srcs[0]->session())
248 , _fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
249 , _inverse_fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
250 , _fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
251 , _inverse_fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
252 , _envelope (new AutomationList(Evoral::Parameter(EnvelopeAutomation)))
253 , _fade_in_suspended (0)
254 , _fade_out_suspended (0)
257 assert (_sources.size() == _master_sources.size());
260 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
262 , AUDIOREGION_COPY_STATE (other)
263 , _automatable (other->session())
264 , _fade_in (new AutomationList (*other->_fade_in))
265 , _inverse_fade_in (new AutomationList(*other->_inverse_fade_in))
266 , _fade_out (new AutomationList (*other->_fade_out))
267 , _inverse_fade_out (new AutomationList (*other->_inverse_fade_out))
268 /* As far as I can see, the _envelope's times are relative to region position, and have nothing
269 to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
271 , _envelope (new AutomationList (*other->_envelope, 0, other->_length))
272 , _fade_in_suspended (0)
273 , _fade_out_suspended (0)
275 /* don't use init here, because we got fade in/out from the other region
277 register_properties ();
278 listen_to_my_curves ();
279 connect_to_analysis_changed ();
280 connect_to_header_position_offset_changed ();
282 assert(_type == DataType::AUDIO);
283 assert (_sources.size() == _master_sources.size());
286 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, framecnt_t offset)
287 : Region (other, offset)
288 , AUDIOREGION_COPY_STATE (other)
289 , _automatable (other->session())
290 , _fade_in (new AutomationList (*other->_fade_in))
291 , _inverse_fade_in (new AutomationList(*other->_inverse_fade_in))
292 , _fade_out (new AutomationList (*other->_fade_out))
293 , _inverse_fade_out (new AutomationList (*other->_inverse_fade_out))
294 /* As far as I can see, the _envelope's times are relative to region position, and have nothing
295 to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
297 , _envelope (new AutomationList (*other->_envelope, offset, other->_length))
298 , _fade_in_suspended (0)
299 , _fade_out_suspended (0)
301 /* don't use init here, because we got fade in/out from the other region
303 register_properties ();
304 listen_to_my_curves ();
305 connect_to_analysis_changed ();
306 connect_to_header_position_offset_changed ();
308 assert(_type == DataType::AUDIO);
309 assert (_sources.size() == _master_sources.size());
312 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, const SourceList& srcs)
313 : Region (boost::static_pointer_cast<const Region>(other), srcs)
314 , AUDIOREGION_COPY_STATE (other)
315 , _automatable (other->session())
316 , _fade_in (new AutomationList (*other->_fade_in))
317 , _inverse_fade_in (new AutomationList(*other->_inverse_fade_in))
318 , _fade_out (new AutomationList (*other->_fade_out))
319 , _inverse_fade_out (new AutomationList (*other->_inverse_fade_out))
320 , _envelope (new AutomationList (*other->_envelope))
321 , _fade_in_suspended (0)
322 , _fade_out_suspended (0)
324 /* make-a-sort-of-copy-with-different-sources constructor (used by audio filter) */
326 register_properties ();
328 listen_to_my_curves ();
329 connect_to_analysis_changed ();
330 connect_to_header_position_offset_changed ();
332 assert (_sources.size() == _master_sources.size());
335 AudioRegion::AudioRegion (SourceList& srcs)
337 , AUDIOREGION_STATE_DEFAULT
338 , _automatable(srcs[0]->session())
339 , _fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
340 , _inverse_fade_in (new AutomationList(Evoral::Parameter(FadeInAutomation)))
341 , _fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
342 , _inverse_fade_out (new AutomationList(Evoral::Parameter(FadeOutAutomation)))
343 , _envelope (new AutomationList(Evoral::Parameter(EnvelopeAutomation)))
344 , _fade_in_suspended (0)
345 , _fade_out_suspended (0)
349 assert(_type == DataType::AUDIO);
350 assert (_sources.size() == _master_sources.size());
353 AudioRegion::~AudioRegion ()
358 AudioRegion::post_set (const PropertyChange& /*ignored*/)
361 _sync_position = _start;
364 /* return to default fades if the existing ones are too long */
366 if (_left_of_split) {
367 if (_fade_in->back()->when >= _length) {
368 set_default_fade_in ();
370 set_default_fade_out ();
371 _left_of_split = false;
374 if (_right_of_split) {
375 if (_fade_out->back()->when >= _length) {
376 set_default_fade_out ();
379 set_default_fade_in ();
380 _right_of_split = false;
383 /* If _length changed, adjust our gain envelope accordingly */
384 _envelope->truncate_end (_length);
388 AudioRegion::connect_to_analysis_changed ()
390 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
391 (*i)->AnalysisChanged.connect_same_thread (*this, boost::bind (&AudioRegion::invalidate_transients, this));
396 AudioRegion::connect_to_header_position_offset_changed ()
398 set<boost::shared_ptr<Source> > unique_srcs;
400 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
402 /* connect only once to HeaderPositionOffsetChanged, even if sources are replicated
405 if (unique_srcs.find (*i) == unique_srcs.end ()) {
406 unique_srcs.insert (*i);
407 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (*i);
409 afs->HeaderPositionOffsetChanged.connect_same_thread (*this, boost::bind (&AudioRegion::source_offset_changed, this));
416 AudioRegion::listen_to_my_curves ()
418 _envelope->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::envelope_changed, this));
419 _fade_in->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_in_changed, this));
420 _fade_out->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_out_changed, this));
424 AudioRegion::set_envelope_active (bool yn)
426 if (envelope_active() != yn) {
427 _envelope_active = yn;
428 send_change (PropertyChange (Properties::envelope_active));
433 AudioRegion::read_peaks (PeakData *buf, framecnt_t npeaks, framecnt_t offset, framecnt_t cnt, uint32_t chan_n, double samples_per_unit) const
435 if (chan_n >= _sources.size()) {
439 if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, samples_per_unit)) {
442 if (_scale_amplitude != 1.0f) {
443 for (framecnt_t n = 0; n < npeaks; ++n) {
444 buf[n].max *= _scale_amplitude;
445 buf[n].min *= _scale_amplitude;
452 /** @param buf Buffer to write data to (existing data will be overwritten).
453 * @param pos Position to read from as an offset from the region position.
454 * @param cnt Number of frames to read.
455 * @param channel Channel to read from.
458 AudioRegion::read (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
460 /* raw read, no fades, no gain, nada */
461 return read_from_sources (_sources, _length, buf, _position + pos, cnt, channel);
465 AudioRegion::master_read_at (Sample *buf, Sample* /*mixdown_buffer*/, float* /*gain_buffer*/,
466 framepos_t position, framecnt_t cnt, uint32_t chan_n) const
468 /* do not read gain/scaling/fades and do not count this disk i/o in statistics */
471 return read_from_sources (
472 _master_sources, _master_sources.front()->length (_master_sources.front()->timeline_position()),
473 buf, position, cnt, chan_n
477 /** @param buf Buffer to mix data into.
478 * @param mixdown_buffer Scratch buffer for audio data.
479 * @param gain_buffer Scratch buffer for gain data.
480 * @param position Position within the session to read from.
481 * @param cnt Number of frames to read.
482 * @param chan_n Channel number to read.
485 AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
488 uint32_t chan_n) const
490 /* We are reading data from this region into buf (possibly via mixdown_buffer).
491 The caller has verified that we cover the desired section.
494 /* See doc/region_read.svg for a drawing which might help to explain
500 if (n_channels() == 0) {
505 return 0; /* read nothing */
509 /* WORK OUT WHERE TO GET DATA FROM */
513 assert (position >= _position);
514 frameoffset_t const internal_offset = position - _position;
516 if (internal_offset >= _length) {
517 return 0; /* read nothing */
520 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
521 return 0; /* read nothing */
525 /* COMPUTE DETAILS OF ANY FADES INVOLVED IN THIS READ */
527 /* Amount (length) of fade in that we are dealing with in this read */
528 framecnt_t fade_in_limit = 0;
530 /* Offset from buf / mixdown_buffer of the start
531 of any fade out that we are dealing with
533 frameoffset_t fade_out_offset = 0;
535 /* Amount (length) of fade out that we are dealing with in this read */
536 framecnt_t fade_out_limit = 0;
538 framecnt_t fade_interval_start = 0;
542 if (_fade_in_active && _session.config.get_use_region_fades()) {
544 framecnt_t fade_in_length = (framecnt_t) _fade_in->back()->when;
546 /* see if this read is within the fade in */
548 if (internal_offset < fade_in_length) {
549 fade_in_limit = min (to_read, fade_in_length - internal_offset);
555 if (_fade_out_active && _session.config.get_use_region_fades()) {
557 /* see if some part of this read is within the fade out */
559 /* ................. >| REGION
565 _length - fade_out_length
568 ^internal_offset + to_read
570 we need the intersection of [internal_offset,internal_offset+to_read] with
571 [_length - fade_out_length, _length]
576 fade_interval_start = max (internal_offset, _length - framecnt_t (_fade_out->back()->when));
577 framecnt_t fade_interval_end = min(internal_offset + to_read, _length.val());
579 if (fade_interval_end > fade_interval_start) {
580 /* (part of the) the fade out is in this buffer */
581 fade_out_limit = fade_interval_end - fade_interval_start;
582 fade_out_offset = fade_interval_start - internal_offset;
586 /* READ DATA FROM THE SOURCE INTO mixdown_buffer.
587 We can never read directly into buf, since it may contain data
588 from a region `below' this one in the stack, and our fades (if they exist)
589 may need to mix with the existing data.
592 if (read_from_sources (_sources, _length, mixdown_buffer, position, to_read, chan_n) != to_read) {
596 /* APPLY REGULAR GAIN CURVES AND SCALING TO mixdown_buffer */
598 if (envelope_active()) {
599 _envelope->curve().get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
601 if (_scale_amplitude != 1.0f) {
602 for (framecnt_t n = 0; n < to_read; ++n) {
603 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
606 for (framecnt_t n = 0; n < to_read; ++n) {
607 mixdown_buffer[n] *= gain_buffer[n];
610 } else if (_scale_amplitude != 1.0f) {
611 apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
614 /* APPLY FADES TO THE DATA IN mixdown_buffer AND MIX THE RESULTS INTO
615 * buf. The key things to realize here: (1) the fade being applied is
616 * (as of April 26th 2012) just the inverse of the fade in curve (2)
617 * "buf" contains data from lower regions already. So this operation
618 * fades out the existing material.
621 if (fade_in_limit != 0) {
624 if (_inverse_fade_in) {
626 /* explicit inverse fade in curve (e.g. for constant
627 * power), so we have to fetch it.
630 _inverse_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
632 /* Fade the data from lower layers out */
633 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
634 buf[n] *= gain_buffer[n];
637 /* refill gain buffer with the fade in */
639 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
643 /* no explicit inverse fade in, so just use (1 - fade
644 * in) for the fade out of lower layers
647 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
649 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
650 buf[n] *= 1 - gain_buffer[n];
654 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
657 /* Mix our newly-read data in, with the fade */
658 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
659 buf[n] += mixdown_buffer[n] * gain_buffer[n];
663 if (fade_out_limit != 0) {
665 framecnt_t const curve_offset = fade_interval_start - (_length - _fade_out->back()->when);
668 if (_inverse_fade_out) {
670 _inverse_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
672 /* Fade the data from lower levels in */
673 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
674 buf[m] *= gain_buffer[n];
677 /* fetch the actual fade out */
679 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
683 /* no explicit inverse fade out (which is
684 * actually a fade in), so just use (1 - fade
685 * out) for the fade in of lower layers
688 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
690 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
691 buf[m] *= 1 - gain_buffer[n];
695 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
698 /* Mix our newly-read data with whatever was already there,
699 with the fade out applied to our data.
701 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
702 buf[m] += mixdown_buffer[m] * gain_buffer[n];
706 /* MIX OR COPY THE REGION BODY FROM mixdown_buffer INTO buf */
708 framecnt_t const N = to_read - fade_in_limit - fade_out_limit;
711 memcpy (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N * sizeof (Sample));
713 mix_buffers_no_gain (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N);
720 /** Read data directly from one of our sources, accounting for the situation when the track has a different channel
721 * count to the region.
723 * @param srcs Source list to get our source from.
724 * @param limit Furthest that we should read, as an offset from the region position.
725 * @param buf Buffer to write data into (existing contents of the buffer will be overwritten)
726 * @param position Position to read from, in session frames.
727 * @param cnt Number of frames to read.
728 * @param chan_n Channel to read from.
729 * @return Number of frames read.
733 AudioRegion::read_from_sources (SourceList const & srcs, framecnt_t limit, Sample* buf, framepos_t position, framecnt_t cnt, uint32_t chan_n) const
735 frameoffset_t const internal_offset = position - _position;
736 if (internal_offset >= limit) {
740 framecnt_t const to_read = min (cnt, limit - internal_offset);
745 if (chan_n < n_channels()) {
747 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[chan_n]);
748 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
749 return 0; /* "read nothing" */
754 /* track is N-channel, this region has fewer channels; silence the ones
758 if (Config->get_replicate_missing_region_channels()) {
759 /* track is N-channel, this region has less channels, so use a relevant channel
762 uint32_t channel = n_channels() % chan_n;
763 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[channel]);
765 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
766 return 0; /* "read nothing" */
775 AudioRegion::state ()
777 XMLNode& node (Region::state ());
780 LocaleGuard lg (X_("POSIX"));
782 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
783 node.add_property ("channels", buf);
785 Stateful::add_properties (node);
787 child = node.add_child ("Envelope");
789 bool default_env = false;
791 // If there are only two points, the points are in the start of the region and the end of the region
792 // so, if they are both at 1.0f, that means the default region.
794 if (_envelope->size() == 2 &&
795 _envelope->front()->value == 1.0f &&
796 _envelope->back()->value==1.0f) {
797 if (_envelope->front()->when == 0 && _envelope->back()->when == _length) {
803 child->add_property ("default", "yes");
805 child->add_child_nocopy (_envelope->get_state ());
808 child = node.add_child (X_("FadeIn"));
810 if (_default_fade_in) {
811 child->add_property ("default", "yes");
813 child->add_child_nocopy (_fade_in->get_state ());
816 if (_inverse_fade_in) {
817 child = node.add_child (X_("InvFadeIn"));
818 child->add_child_nocopy (_inverse_fade_in->get_state ());
821 child = node.add_child (X_("FadeOut"));
823 if (_default_fade_out) {
824 child->add_property ("default", "yes");
826 child->add_child_nocopy (_fade_out->get_state ());
829 if (_inverse_fade_out) {
830 child = node.add_child (X_("InvFadeOut"));
831 child->add_child_nocopy (_inverse_fade_out->get_state ());
838 AudioRegion::_set_state (const XMLNode& node, int version, PropertyChange& what_changed, bool send)
840 const XMLNodeList& nlist = node.children();
841 const XMLProperty *prop;
842 LocaleGuard lg (X_("POSIX"));
843 boost::shared_ptr<Playlist> the_playlist (_playlist.lock());
845 suspend_property_changes ();
848 the_playlist->freeze ();
852 /* this will set all our State members and stuff controlled by the Region.
853 It should NOT send any changed signals - that is our responsibility.
856 Region::_set_state (node, version, what_changed, false);
858 if ((prop = node.property ("scale-gain")) != 0) {
859 float a = atof (prop->value().c_str());
860 if (a != _scale_amplitude) {
861 _scale_amplitude = a;
862 what_changed.add (Properties::scale_amplitude);
866 /* Now find envelope description and other related child items */
868 _envelope->freeze ();
870 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
876 if (child->name() == "Envelope") {
880 if ((prop = child->property ("default")) != 0 || _envelope->set_state (*child, version)) {
881 set_default_envelope ();
884 _envelope->truncate_end (_length);
887 } else if (child->name() == "FadeIn") {
891 if (((prop = child->property ("default")) != 0 && string_is_affirmative (prop->value())) || (prop = child->property ("steepness")) != 0) {
892 set_default_fade_in ();
894 XMLNode* grandchild = child->child ("AutomationList");
896 _fade_in->set_state (*grandchild, version);
900 if ((prop = child->property ("active")) != 0) {
901 if (string_is_affirmative (prop->value())) {
902 set_fade_in_active (true);
904 set_fade_in_active (false);
910 if ((prop = child->property ("is-xfade")) != 0) {
911 _fade_in_is_xfade = string_is_affirmative (prop->value());
914 } else if (child->name() == "FadeOut") {
918 if (((prop = child->property ("default")) != 0 && (string_is_affirmative (prop->value()))) || (prop = child->property ("steepness")) != 0) {
919 set_default_fade_out ();
921 XMLNode* grandchild = child->child ("AutomationList");
923 _fade_out->set_state (*grandchild, version);
927 if ((prop = child->property ("active")) != 0) {
928 if (string_is_affirmative (prop->value())) {
929 set_fade_out_active (true);
931 set_fade_out_active (false);
937 if ((prop = child->property ("is-xfade")) != 0) {
938 _fade_out_is_xfade = string_is_affirmative (prop->value());
941 } else if (child->name() == "InvFadeIn") {
942 XMLNode* grandchild = child->child ("AutomationList");
944 _inverse_fade_in->set_state (*grandchild, version);
946 } else if (child->name() == "InvFadeOut") {
947 XMLNode* grandchild = child->child ("AutomationList");
949 _inverse_fade_out->set_state (*grandchild, version);
955 resume_property_changes ();
958 send_change (what_changed);
962 the_playlist->thaw ();
969 AudioRegion::set_state (const XMLNode& node, int version)
971 PropertyChange what_changed;
972 return _set_state (node, version, what_changed, true);
976 AudioRegion::set_fade_in_shape (FadeShape shape)
978 set_fade_in (shape, (framecnt_t) _fade_in->back()->when);
982 AudioRegion::set_fade_out_shape (FadeShape shape)
984 set_fade_out (shape, (framecnt_t) _fade_out->back()->when);
988 AudioRegion::set_fade_in (boost::shared_ptr<AutomationList> f)
993 _default_fade_in = false;
995 send_change (PropertyChange (Properties::fade_in));
999 AudioRegion::set_fade_in (FadeShape shape, framecnt_t len)
1001 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeInAutomation));
1002 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeInAutomation));
1003 boost::shared_ptr<Evoral::ControlList> c3 (new Evoral::ControlList (FadeInAutomation));
1005 _fade_in->freeze ();
1007 _inverse_fade_in->clear ();
1011 _fade_in->fast_simple_add (0.0, 0.0);
1012 _fade_in->fast_simple_add (len, 1.0);
1013 reverse_curve (_inverse_fade_in, _fade_in);
1017 generate_db_fade (_fade_in, len, 10, -60);
1018 reverse_curve (c1, _fade_in);
1019 _fade_in->copy_events (*c1);
1020 generate_inverse_power_curve (_inverse_fade_in, _fade_in);
1024 generate_db_fade (c1, len, 10, -1); // start off with a slow fade
1025 generate_db_fade (c2, len, 10, -80); // end with a fast fade
1026 merge_curves (_fade_in, c1, c2);
1027 reverse_curve (c3, _fade_in);
1028 _fade_in->copy_events (*c3);
1029 generate_inverse_power_curve (_inverse_fade_in, _fade_in);
1032 case FadeConstantPower:
1033 for (int i = 0; i < 9; ++i) {
1034 float dist = (float) i / 10.0f;
1035 _fade_in->fast_simple_add (len*dist, sin (dist*M_PI/2));
1037 _fade_in->fast_simple_add (len, 1.0);
1038 reverse_curve (_inverse_fade_in, _fade_in);
1042 //start with a nearly linear cuve
1043 _fade_in->fast_simple_add (0, 1);
1044 _fade_in->fast_simple_add (0.5*len, 0.6);
1045 //now generate a fade-out curve by successively applying a gain drop
1046 const float breakpoint = 0.7; //linear for first 70%
1047 const int num_steps = 9;
1048 for (int i = 2; i < num_steps; i++) {
1049 float coeff = (1.0-breakpoint);
1050 for (int j = 0; j < i; j++) {
1051 coeff *= 0.5; //6dB drop per step
1053 _fade_in->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
1055 _fade_in->fast_simple_add (len, VERY_SMALL_SIGNAL);
1056 reverse_curve (c3, _fade_in);
1057 _fade_in->copy_events (*c3);
1058 reverse_curve (_inverse_fade_in, _fade_in );
1062 _default_fade_in = false;
1064 send_change (PropertyChange (Properties::fade_in));
1068 AudioRegion::set_fade_out (boost::shared_ptr<AutomationList> f)
1070 _fade_out->freeze ();
1073 _default_fade_out = false;
1075 send_change (PropertyChange (Properties::fade_in));
1079 AudioRegion::set_fade_out (FadeShape shape, framecnt_t len)
1081 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeOutAutomation));
1082 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeOutAutomation));
1084 _fade_out->freeze ();
1085 _fade_out->clear ();
1086 _inverse_fade_out->clear ();
1090 _fade_out->fast_simple_add (0.0, 1.0);
1091 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1092 reverse_curve (_inverse_fade_out, _fade_out);
1096 generate_db_fade (_fade_out, len, 10, -60);
1097 generate_inverse_power_curve (_inverse_fade_out, _fade_out);
1101 generate_db_fade (c1, len, 10, -1); //start off with a slow fade
1102 generate_db_fade (c2, len, 10, -80); //end with a fast fade
1103 merge_curves (_fade_out, c1, c2);
1104 generate_inverse_power_curve (_inverse_fade_out, _fade_out);
1107 case FadeConstantPower:
1108 //constant-power fades use a sin/cos relationship
1109 //the cutoff is abrupt but it has the benefit of being symmetrical
1110 _fade_out->fast_simple_add (0.0, 1.0);
1111 for (int i = 1; i < 9; i++ ) {
1112 float dist = (float)i/10.0;
1113 _fade_out->fast_simple_add ((len * dist), cos(dist*M_PI/2));
1115 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1116 reverse_curve (_inverse_fade_out, _fade_out);
1120 //start with a nearly linear cuve
1121 _fade_out->fast_simple_add (0, 1);
1122 _fade_out->fast_simple_add (0.5*len, 0.6);
1124 //now generate a fade-out curve by successively applying a gain drop
1125 const float breakpoint = 0.7; //linear for first 70%
1126 const int num_steps = 9;
1127 for (int i = 2; i < num_steps; i++) {
1128 float coeff = (1.0-breakpoint);
1129 for (int j = 0; j < i; j++) {
1130 coeff *= 0.5; //6dB drop per step
1132 _fade_out->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
1134 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1135 reverse_curve (_inverse_fade_out, _fade_out);
1139 _default_fade_out = false;
1141 send_change (PropertyChange (Properties::fade_out));
1145 AudioRegion::set_fade_in_length (framecnt_t len)
1147 if (len > _length) {
1155 bool changed = _fade_in->extend_to (len);
1158 if (_inverse_fade_in) {
1159 _inverse_fade_in->extend_to (len);
1162 if (_session.config.get_xfade_model() == FullCrossfade &&
1163 _session.config.get_auto_xfade() &&
1164 _fade_in_is_xfade && !_fade_in_is_short) {
1166 /* trim a single other region below us to the new start
1170 boost::shared_ptr<Region> other = get_single_other_xfade_region (true);
1172 other->trim_end (position() + len);
1176 _default_fade_in = false;
1177 send_change (PropertyChange (Properties::fade_in));
1182 AudioRegion::set_fade_out_length (framecnt_t len)
1184 if (len > _length) {
1192 bool changed = _fade_out->extend_to (len);
1196 if (_inverse_fade_out) {
1197 _inverse_fade_out->extend_to (len);
1199 _default_fade_out = false;
1201 if (_session.config.get_xfade_model() == FullCrossfade &&
1202 _session.config.get_auto_xfade() &&
1203 _fade_out_is_xfade && !_fade_out_is_short) {
1205 /* trim a single other region below us to the new start
1209 boost::shared_ptr<Region> other = get_single_other_xfade_region (false);
1211 other->trim_front (last_frame() - len);
1215 send_change (PropertyChange (Properties::fade_out));
1220 AudioRegion::set_fade_in_active (bool yn)
1222 if (yn == _fade_in_active) {
1226 _fade_in_active = yn;
1227 send_change (PropertyChange (Properties::fade_in_active));
1231 AudioRegion::set_fade_out_active (bool yn)
1233 if (yn == _fade_out_active) {
1236 _fade_out_active = yn;
1237 send_change (PropertyChange (Properties::fade_out_active));
1241 AudioRegion::fade_in_is_default () const
1243 return _fade_in->size() == 2 && _fade_in->front()->when == 0 && _fade_in->back()->when == 64;
1247 AudioRegion::fade_out_is_default () const
1249 return _fade_out->size() == 2 && _fade_out->front()->when == 0 && _fade_out->back()->when == 64;
1253 AudioRegion::set_default_fade_in ()
1255 _fade_in_suspended = 0;
1256 _fade_in_is_xfade = false;
1257 _fade_in_is_short = true;
1258 set_fade_in (FadeLinear, 64);
1262 AudioRegion::set_default_fade_out ()
1264 _fade_out_suspended = 0;
1265 _fade_out_is_xfade = false;
1266 _fade_out_is_short = true;
1267 set_fade_out (FadeLinear, 64);
1271 AudioRegion::set_default_fades ()
1273 set_default_fade_in ();
1274 set_default_fade_out ();
1278 AudioRegion::set_default_envelope ()
1280 _envelope->freeze ();
1281 _envelope->clear ();
1282 _envelope->fast_simple_add (0, 1.0f);
1283 _envelope->fast_simple_add (_length, 1.0f);
1288 AudioRegion::recompute_at_end ()
1290 /* our length has changed. recompute a new final point by interpolating
1291 based on the the existing curve.
1294 _envelope->freeze ();
1295 _envelope->truncate_end (_length);
1298 suspend_property_changes();
1300 if (_left_of_split) {
1301 set_default_fade_out ();
1302 _left_of_split = false;
1303 } else if (_fade_out->back()->when > _length) {
1304 _fade_out->extend_to (_length);
1305 send_change (PropertyChange (Properties::fade_out));
1308 if (_fade_in->back()->when > _length) {
1309 _fade_in->extend_to (_length);
1310 send_change (PropertyChange (Properties::fade_in));
1313 resume_property_changes();
1317 AudioRegion::recompute_at_start ()
1319 /* as above, but the shift was from the front */
1321 _envelope->truncate_start (_length);
1323 suspend_property_changes();
1325 if (_right_of_split) {
1326 set_default_fade_in ();
1327 _right_of_split = false;
1328 } else if (_fade_in->back()->when > _length) {
1329 _fade_in->extend_to (_length);
1330 send_change (PropertyChange (Properties::fade_in));
1333 if (_fade_out->back()->when > _length) {
1334 _fade_out->extend_to (_length);
1335 send_change (PropertyChange (Properties::fade_out));
1338 resume_property_changes();
1342 AudioRegion::separate_by_channel (Session& /*session*/, vector<boost::shared_ptr<Region> >& v) const
1348 if (_sources.size() < 2) {
1352 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
1354 srcs.push_back (*i);
1358 if (_sources.size() == 2) {
1366 new_name += ('0' + n + 1);
1369 /* create a copy with just one source. prevent if from being thought of as
1370 "whole file" even if it covers the entire source file(s).
1375 plist.add (Properties::start, _start.val());
1376 plist.add (Properties::length, _length.val());
1377 plist.add (Properties::name, new_name);
1378 plist.add (Properties::layer, layer ());
1380 v.push_back(RegionFactory::create (srcs, plist));
1381 v.back()->set_whole_file (false);
1390 AudioRegion::read_raw_internal (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
1392 return audio_source(channel)->read (buf, pos, cnt);
1396 AudioRegion::set_scale_amplitude (gain_t g)
1398 boost::shared_ptr<Playlist> pl (playlist());
1400 _scale_amplitude = g;
1402 /* tell the diskstream we're in */
1405 pl->ContentsChanged();
1408 /* tell everybody else */
1410 send_change (PropertyChange (Properties::scale_amplitude));
1413 /** @return the maximum (linear) amplitude of the region, or a -ve
1414 * number if the Progress object reports that the process was cancelled.
1417 AudioRegion::maximum_amplitude (Progress* p) const
1419 framepos_t fpos = _start;
1420 framepos_t const fend = _start + _length;
1423 framecnt_t const blocksize = 64 * 1024;
1424 Sample buf[blocksize];
1426 while (fpos < fend) {
1430 framecnt_t const to_read = min (fend - fpos, blocksize);
1432 for (n = 0; n < n_channels(); ++n) {
1436 if (read_raw_internal (buf, fpos, to_read, n) != to_read) {
1440 maxamp = compute_peak (buf, to_read, maxamp);
1445 p->set_progress (float (fpos - _start) / _length);
1446 if (p->cancelled ()) {
1455 /** Normalize using a given maximum amplitude and target, so that region
1456 * _scale_amplitude becomes target / max_amplitude.
1459 AudioRegion::normalize (float max_amplitude, float target_dB)
1461 gain_t target = dB_to_coefficient (target_dB);
1463 if (target == 1.0f) {
1464 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1465 that we may have clipped.
1467 target -= FLT_EPSILON;
1470 if (max_amplitude == 0.0f) {
1471 /* don't even try */
1475 if (max_amplitude == target) {
1476 /* we can't do anything useful */
1480 set_scale_amplitude (target / max_amplitude);
1484 AudioRegion::fade_in_changed ()
1486 send_change (PropertyChange (Properties::fade_in));
1490 AudioRegion::fade_out_changed ()
1492 send_change (PropertyChange (Properties::fade_out));
1496 AudioRegion::envelope_changed ()
1498 send_change (PropertyChange (Properties::envelope));
1502 AudioRegion::suspend_fade_in ()
1504 if (++_fade_in_suspended == 1) {
1505 if (fade_in_is_default()) {
1506 set_fade_in_active (false);
1512 AudioRegion::resume_fade_in ()
1514 if (--_fade_in_suspended == 0 && _fade_in_suspended) {
1515 set_fade_in_active (true);
1520 AudioRegion::suspend_fade_out ()
1522 if (++_fade_out_suspended == 1) {
1523 if (fade_out_is_default()) {
1524 set_fade_out_active (false);
1530 AudioRegion::resume_fade_out ()
1532 if (--_fade_out_suspended == 0 &&_fade_out_suspended) {
1533 set_fade_out_active (true);
1538 AudioRegion::speed_mismatch (float sr) const
1540 if (_sources.empty()) {
1541 /* impossible, but ... */
1545 float fsr = audio_source()->sample_rate();
1551 AudioRegion::source_offset_changed ()
1553 /* XXX this fixes a crash that should not occur. It does occur
1554 becauses regions are not being deleted when a session
1555 is unloaded. That bug must be fixed.
1558 if (_sources.empty()) {
1562 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(_sources.front());
1564 if (afs && afs->destructive()) {
1565 // set_start (source()->natural_position(), this);
1566 set_position (source()->natural_position());
1570 boost::shared_ptr<AudioSource>
1571 AudioRegion::audio_source (uint32_t n) const
1573 // Guaranteed to succeed (use a static cast for speed?)
1574 return boost::dynamic_pointer_cast<AudioSource>(source(n));
1578 AudioRegion::adjust_transients (frameoffset_t delta)
1580 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1581 (*x) = (*x) + delta;
1584 send_change (PropertyChange (Properties::valid_transients));
1590 AudioRegion::update_transient (framepos_t old_position, framepos_t new_position)
1592 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1593 if ((*x) == old_position) {
1594 (*x) = new_position;
1595 send_change (PropertyChange (Properties::valid_transients));
1605 AudioRegion::add_transient (framepos_t where)
1607 _transients.push_back(where);
1608 _valid_transients = true;
1610 send_change (PropertyChange (Properties::valid_transients));
1614 AudioRegion::remove_transient (framepos_t where)
1616 _transients.remove(where);
1617 _valid_transients = true;
1619 send_change (PropertyChange (Properties::valid_transients));
1623 AudioRegion::set_transients (AnalysisFeatureList& results)
1625 _transients.clear();
1626 _transients = results;
1627 _valid_transients = true;
1629 send_change (PropertyChange (Properties::valid_transients));
1635 AudioRegion::get_transients (AnalysisFeatureList& results, bool force_new)
1637 boost::shared_ptr<Playlist> pl = playlist();
1643 if (_valid_transients && !force_new) {
1644 results = _transients;
1648 SourceList::iterator s;
1650 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1651 if (!(*s)->has_been_analysed()) {
1652 cerr << "For " << name() << " source " << (*s)->name() << " has not been analyzed\n";
1657 if (s == _sources.end()) {
1658 /* all sources are analyzed, merge data from each one */
1660 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1662 /* find the set of transients within the bounds of this region */
1664 AnalysisFeatureList::iterator low = lower_bound ((*s)->transients.begin(),
1665 (*s)->transients.end(),
1668 AnalysisFeatureList::iterator high = upper_bound ((*s)->transients.begin(),
1669 (*s)->transients.end(),
1674 results.insert (results.end(), low, high);
1677 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1679 /* translate all transients to current position */
1681 for (AnalysisFeatureList::iterator x = results.begin(); x != results.end(); ++x) {
1686 _transients = results;
1687 _valid_transients = true;
1692 /* no existing/complete transient info */
1694 static bool analyse_dialog_shown = false; /* global per instance of Ardour */
1696 if (!Config->get_auto_analyse_audio()) {
1697 if (!analyse_dialog_shown) {
1698 pl->session().Dialog (_("\
1699 You have requested an operation that requires audio analysis.\n\n\
1700 You currently have \"auto-analyse-audio\" disabled, which means \
1701 that transient data must be generated every time it is required.\n\n\
1702 If you are doing work that will require transient data on a \
1703 regular basis, you should probably enable \"auto-analyse-audio\" \
1704 then quit ardour and restart.\n\n\
1705 This dialog will not display again. But you may notice a slight delay \
1706 in this and future transient-detection operations.\n\
1708 analyse_dialog_shown = true;
1712 TransientDetector t (pl->session().frame_rate());
1713 bool existing_results = !results.empty();
1715 _transients.clear ();
1716 _valid_transients = false;
1718 for (uint32_t i = 0; i < n_channels(); ++i) {
1720 AnalysisFeatureList these_results;
1724 if (t.run ("", this, i, these_results)) {
1728 /* translate all transients to give absolute position */
1730 for (AnalysisFeatureList::iterator i = these_results.begin(); i != these_results.end(); ++i) {
1736 _transients.insert (_transients.end(), these_results.begin(), these_results.end());
1739 if (!results.empty()) {
1740 if (existing_results) {
1742 /* merge our transients into the existing ones, then clean up
1746 results.insert (results.end(), _transients.begin(), _transients.end());
1747 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1750 /* make sure ours are clean too */
1752 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1756 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1757 results = _transients;
1760 _valid_transients = true;
1765 /** Find areas of `silence' within a region.
1767 * @param threshold Threshold below which signal is considered silence (as a sample value)
1768 * @param min_length Minimum length of silent period to be reported.
1769 * @return Silent intervals, measured relative to the region start in the source
1773 AudioRegion::find_silence (Sample threshold, framecnt_t min_length, InterThreadInfo& itt) const
1775 framecnt_t const block_size = 64 * 1024;
1776 boost::scoped_array<Sample> loudest (new Sample[block_size]);
1777 boost::scoped_array<Sample> buf (new Sample[block_size]);
1779 framepos_t pos = _start;
1780 framepos_t const end = _start + _length - 1;
1782 AudioIntervalResult silent_periods;
1784 bool in_silence = false;
1785 frameoffset_t silence_start = 0;
1787 while (pos < end && !itt.cancel) {
1789 /* fill `loudest' with the loudest absolute sample at each instant, across all channels */
1790 memset (loudest.get(), 0, sizeof (Sample) * block_size);
1791 for (uint32_t n = 0; n < n_channels(); ++n) {
1793 read_raw_internal (buf.get(), pos, block_size, n);
1794 for (framecnt_t i = 0; i < block_size; ++i) {
1795 loudest[i] = max (loudest[i], abs (buf[i]));
1799 /* now look for silence */
1800 for (framecnt_t i = 0; i < block_size; ++i) {
1801 bool const silence = abs (loudest[i]) < threshold;
1802 if (silence && !in_silence) {
1803 /* non-silence to silence */
1805 silence_start = pos + i;
1806 } else if (!silence && in_silence) {
1807 /* silence to non-silence */
1809 if (pos + i - 1 - silence_start >= min_length) {
1810 silent_periods.push_back (std::make_pair (silence_start, pos + i - 1));
1816 itt.progress = (end-pos)/(double)_length;
1819 if (in_silence && end - 1 - silence_start >= min_length) {
1820 /* last block was silent, so finish off the last period */
1821 silent_periods.push_back (std::make_pair (silence_start, end));
1826 return silent_periods;
1829 Evoral::Range<framepos_t>
1830 AudioRegion::body_range () const
1832 return Evoral::Range<framepos_t> (first_frame() + _fade_in->back()->when + 1, last_frame() - _fade_out->back()->when);
1836 AudioRegion::set_fade_in_is_xfade (bool yn)
1838 if (yn == _fade_in_is_xfade) {
1842 _fade_in_is_xfade = yn;
1843 send_change (PropertyChange (Properties::fade_in_is_xfade));
1847 AudioRegion::set_fade_out_is_xfade (bool yn)
1849 if (yn == _fade_out_is_xfade) {
1853 _fade_out_is_xfade = yn;
1854 send_change (PropertyChange (Properties::fade_out_is_xfade));
1858 AudioRegion::set_fade_in_is_short (bool yn)
1860 if (yn == _fade_in_is_short) {
1864 _fade_in_is_short = yn;
1865 send_change (PropertyChange (Properties::fade_in_is_short));
1870 AudioRegion::set_fade_out_is_short (bool yn)
1872 if (yn == _fade_out_is_short) {
1876 _fade_out_is_short = yn;
1877 send_change (PropertyChange (Properties::fade_out_is_short));
1880 boost::shared_ptr<Region>
1881 AudioRegion::get_single_other_xfade_region (bool start) const
1883 boost::shared_ptr<Playlist> pl (playlist());
1886 /* not currently in a playlist - xfade length is unbounded
1889 return boost::shared_ptr<AudioRegion> ();
1892 boost::shared_ptr<RegionList> rl;
1895 rl = pl->regions_at (position());
1897 rl = pl->regions_at (last_frame());
1900 RegionList::iterator i;
1901 boost::shared_ptr<Region> other;
1904 /* count and find the other region in a single pass through the list */
1906 for (i = rl->begin(); i != rl->end(); ++i) {
1907 if ((*i).get() != this) {
1914 /* zero or multiple regions stacked here - don't care about xfades */
1915 return boost::shared_ptr<AudioRegion> ();
1922 AudioRegion::verify_xfade_bounds (framecnt_t len, bool start)
1924 /* this is called from a UI to check on whether a new proposed
1925 length for an xfade is legal or not. it returns the legal
1926 length corresponding to @a len which may be shorter than or
1927 equal to @a len itself.
1930 boost::shared_ptr<Region> other = get_single_other_xfade_region (start);
1934 /* zero or > 2 regions here, don't care about len, but
1935 it can't be longer than the region itself.
1937 return min (length(), len);
1940 /* we overlap a single region. clamp the length of an xfade to
1941 the maximum possible duration of the overlap (if the other
1942 region were trimmed appropriately).
1946 maxlen = other->latest_possible_frame() - position();
1948 maxlen = last_frame() - other->earliest_possible_position();
1951 return min (length(), min (maxlen, len));
1957 int region_read_peaks_from_c (void *arg, uint32_t npeaks, uint32_t start, uint32_t cnt, intptr_t data, uint32_t n_chan, double samples_per_unit)
1959 return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (framecnt_t) npeaks, (framepos_t) start, (framecnt_t) cnt, n_chan,samples_per_unit);
1962 uint32_t region_length_from_c (void *arg)
1965 return ((AudioRegion *) arg)->length();
1968 uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
1970 return ( (AudioRegion *) arg)->audio_source()->available_peaks (zoom_factor) ;